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authorKOVACS Krisztian <hidden@sch.bme.hu>2008-10-01 07:44:42 -0700
committerDavid S. Miller <davem@davemloft.net>2008-10-01 07:44:42 -0700
commit86b08d867d7de001ab224180ed7865fab93fd56e (patch)
treefc081a9ec0d0107f951cc0270da2865e1e3413e2 /net
parent88ef4a5a78e63420dd1dd770f1bd1dc198926b04 (diff)
downloadop-kernel-dev-86b08d867d7de001ab224180ed7865fab93fd56e.zip
op-kernel-dev-86b08d867d7de001ab224180ed7865fab93fd56e.tar.gz
ipv4: Make Netfilter's ip_route_me_harder() non-local address compatible
Netfilter's ip_route_me_harder() tries to re-route packets either generated or re-routed by Netfilter. This patch changes ip_route_me_harder() to handle packets from non-locally-bound sockets with IP_TRANSPARENT set as local and to set the appropriate flowi flags when re-doing the routing lookup. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/inet_connection_sock.c1
-rw-r--r--net/ipv4/ip_output.c4
-rw-r--r--net/ipv4/netfilter.c3
-rw-r--r--net/ipv4/syncookies.c2
4 files changed, 9 insertions, 1 deletions
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 0c1ae68e..432c570 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -335,6 +335,7 @@ struct dst_entry* inet_csk_route_req(struct sock *sk,
.saddr = ireq->loc_addr,
.tos = RT_CONN_FLAGS(sk) } },
.proto = sk->sk_protocol,
+ .flags = inet_sk_flowi_flags(sk),
.uli_u = { .ports =
{ .sport = inet_sk(sk)->sport,
.dport = ireq->rmt_port } } };
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index d533a89..d2a8f8b 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -340,6 +340,7 @@ int ip_queue_xmit(struct sk_buff *skb, int ipfragok)
.saddr = inet->saddr,
.tos = RT_CONN_FLAGS(sk) } },
.proto = sk->sk_protocol,
+ .flags = inet_sk_flowi_flags(sk),
.uli_u = { .ports =
{ .sport = inet->sport,
.dport = inet->dport } } };
@@ -1371,7 +1372,8 @@ void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *ar
.uli_u = { .ports =
{ .sport = tcp_hdr(skb)->dest,
.dport = tcp_hdr(skb)->source } },
- .proto = sk->sk_protocol };
+ .proto = sk->sk_protocol,
+ .flags = ip_reply_arg_flowi_flags(arg) };
security_skb_classify_flow(skb, &fl);
if (ip_route_output_key(sock_net(sk), &rt, &fl))
return;
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index f8edacdf..01671ad 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -20,6 +20,8 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
unsigned int type;
type = inet_addr_type(&init_net, iph->saddr);
+ if (skb->sk && inet_sk(skb->sk)->transparent)
+ type = RTN_LOCAL;
if (addr_type == RTN_UNSPEC)
addr_type = type;
@@ -33,6 +35,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
fl.oif = skb->sk ? skb->sk->sk_bound_dev_if : 0;
fl.mark = skb->mark;
+ fl.flags = skb->sk ? inet_sk_flowi_flags(skb->sk) : 0;
if (ip_route_output_key(&init_net, &rt, &fl) != 0)
return -1;
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index 9d38005..929302b 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -16,6 +16,7 @@
#include <linux/cryptohash.h>
#include <linux/kernel.h>
#include <net/tcp.h>
+#include <net/route.h>
/* Timestamps: lowest 9 bits store TCP options */
#define TSBITS 9
@@ -337,6 +338,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
.saddr = ireq->loc_addr,
.tos = RT_CONN_FLAGS(sk) } },
.proto = IPPROTO_TCP,
+ .flags = inet_sk_flowi_flags(sk),
.uli_u = { .ports =
{ .sport = th->dest,
.dport = th->source } } };
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